It sure would be a shame if you bought new, identical Joy-Con controllers, found they didn’t have drift, and returned the old drifty ones by accident.
5/28 Ninja Edit: today I learned is a form on Nintendo’s website where you can fill out a repair request form. I thought the US had been excluded https://repair.nintendo.com/cc/soConsumer.html?lang=en&sys=SWTCH&type=JOY-CON
I’m a huge fan of Rimworld! Very excited to hear you’re giving it a try. It really can become whatever you want. There is an abundance of Quality of Life mods too. I definitely have recommendations if you’d like.